TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2410
SUBJECT: IPN triangulation of GRB031004A (short/hard; annulus)
DATE:    03/10/07 21:40:01 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>

K. Hurley and T. Cline, on behalf of the Ulysses, HETE, and Mars Odyssey
teams,

I. Mitrofanov, S. Charyshnikov, V. Grinkov, A. Kozyrev, M. Litvak, and
A. Sanin, on behalf of the HEND-Odyssey GRB team,

W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on
behalf of the GRS-Odyssey GRB team, and

G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R.
Vanderspek, J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G.
Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R.
Manchanda, G.  Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T.
Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,
T. Tavenner, T.  Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on
behalf of the HETE GRB team, report:

HETE-FREGATE and Mars Odyssey - HEND observed this 0.5 s long
event at 73687 s.  We have triangulated it to a preliminary
annulus centered at  RA, Decl(2000) = 334.080, -15.296 degrees,
whose radius is 75.364 +/- 0.146 degrees.  This annulus passes
very close to, but formally excludes, the position of SGR1627-41.
However, the spectrum of this burst appears to be hard, so it
is most likely a short/hard GRB.

This annulus may be constrained and/or improved, but as this
event was not observed by Ulysses, a small error box cannot
be obtained for it.